Improvement in strainers for scroll-saws



J. CHASE.

Strainer for Scroll-Saws.

N0.133,563, Patented Dec.3,1872.

Witness es. y ,Vn 1re rz Z512 UNTTED STATES PATENT EErcE.

JAMEs cHAsE, 0E EocHEsTEE, NEW YORK.

IMPROVEMENT IN STRAINERS FORYSCROLL-SAWS.

Specification forming part of Lettere Patent No. 133,563, dated December3, 1872.

To all whom it may concer-n:

Be it known that I, J AMEs CHASE, of Rochester, in the county of Monroe.and State of New York, have invented certain Improvements in Stra-mersfor Scroll-Saws, of which the following is a specification:

My invent-ion relates to that class of scrollsaw strainers in which adefleetin g cord is used; and it consists mainly in attaching each endof such deiiecting cord to a secondary or auxiliary deflecting cord, thelatter bein g attached to a spring or cushioned hanger or followerplateat one or both ends of each.

The drawing represents a front elevation of my invention. Y

The higher rate oi' speed at which a scrollsaw can be run. the morerapid and perfect will it work. It is, therefore, desirable to have theleast possible weight of material to move in the strainer, and to moveit the least possible distance, and at the same time afford thenecessary stroke to the saw. When the deiiectin g cord is attached tothe end of a spring, or to a spring-lever, as heretofore used, theweight of material in either case necessary to aii'ord proper strengthto such parts required much power to overcome their inertia andmomentum, and the constant strain and vibration of the same, upon lightsaws especially, has been too great to permit them to be run as rapidlyas desired. These difficulties are entirely obviated by my tripledeflectingcord strainer.

A is a frame, preferably of iron, to which the hangers h are fixed. Thehangers h are pivoted to the lower points, as shown, and their arms arest upon the points of the set-screws s, which are tapped through lugse east upon the frame A. The hanger-stocks or followerplates b arehinged to the hangers h, and the stocks b' to the hangers h'. A plug, g,of rubber or other suitable material, is inserted in the concave spacebetween the two. The followerplates are each provided with a bifurcatedlug, d, between the lips of which the auxiliary dei fleeting cords C aresecured by means of the knots z' at each end. The primary deiiectingcord D is secured to the others by tying or otherwise. The saw-strap isattached at the point indicated by the dotted line .r.

The hangers and follower-plates may be made straight, and a square oriiat plate of rubber or other spring used; or cushions ot' felt orwoolen cloth may be employed.

Steel wires might be substituted for the i cords, if desired.

I do not claim anything separately that is shown in the patent to S. G.Mason, May 16, 1871; but- What I claim as 'my invention is The maindetlecting cord D, in combination with the auxiliary defiecting cords G,having their ends connected tothe cushioned followerplates b, one ormore of which latter is made adjustable to regulate the tension, and theparts being arranged to act conjointly in the manner and for thepurposes shown and described.

J. CHASE.

Witnesses:

PATRICK MoINTY-EE, W. S. LOUGHBOEOUGE.

